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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - 2500U: Graphics corruption on kernel 5.2"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111122#c30">Comment # 30</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - 2500U: Graphics corruption on kernel 5.2"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111122">bug 111122</a>
from <span class="vcard"><a class="email" href="mailto:william.bonnaventure@gmail.com" title="William Bonnaventure <william.bonnaventure@gmail.com>"> <span class="fn">William Bonnaventure</span></a>
</span></b>
<pre>Fixed issue with a BIOS update on Lenovo E485 (v1.54 with AMD 2500U) with
Fedora 30 KDE.
I had an issue on previous BIOS that requires a kernel option to boot on all
kernels (ivrs_ioapic[32]=00:14.0). After BIOS update, this option is not needed
and there is no longer graphic corruption on Kernel 5.2+. This corruption was
impacting at least Firefox, dolphin and the Plasma Desktop.
KDE plasma 5.15.5
mesa 19.1.6
xorg-x11-drv-amdgpu 19.0.1
libdrm 2.4.99
As of my observation, the graphic corruption was introduced in the amdgpu
driver inside Kernel 5.2 and occurs only when forcing boot with the ivrs_ioapic
override.</pre>
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